package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;

import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;

import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;

import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;

    @Transactional
    @Override
    public void saveWithDish(SetmealDTO setmealDTO) {

        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        setmealMapper.saveWithDish(setmeal);
        //DTO对象是没有创建时间属性的 所以获取到的数据赋值给setmeal对象
        //  //获取生成的套餐id
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmeal.getId());
        });
        // //保存套餐和菜品的关联关系
        setmealDishMapper.insertBatch(setmealDishes);

    }

    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {

        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());

        Page<Setmeal> page = setmealMapper.pageQuery(setmealPageQueryDTO);


        return new PageResult(page.getTotal(), page.getResult());

    }

    @Override
    public void startOrStop(Integer status, Long id) {
        // //起售套餐时，判断套餐内是否有停售菜品，有停售菜品提示"套餐内包含未启售菜品，无法启售"
        if (status == 1) {
            List<Dish> dishList = dishMapper.getBySetmealId(id);
            if (dishList != null && !dishList.isEmpty()) {
                dishList.forEach(dish -> {
                    if (dish.getStatus() == 0) {
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }
        }

        Setmeal setmeal = Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);

        }
    @Transactional
    @Override
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);
        setmealMapper.update(setmeal);

        Long setmealId = setmealDTO.getId();//获取当前套餐id
        setmealDishMapper.delete(setmealId);//删除当前套餐对应菜品数据
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();//获取当前套餐对应菜品数据
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);//设置套餐id

        });
        setmealDishMapper.insertBatch(setmealDishes);

    }

    @Override
    public SetmealVO getById(Long id) {
       Setmeal setmeal= setmealMapper.getById(id);
       List<SetmealDish> setmealDishes = setmealDishMapper.getById(id);
       SetmealVO setmealVO = new SetmealVO();
       BeanUtils.copyProperties(setmeal,setmealVO);
       setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;


    }

    @Transactional
    public void deleteBatch(List<Long> ids) {
        ids.forEach(id -> {
            Setmeal setmeal = setmealMapper.getById(id);
            if(StatusConstant.ENABLE == setmeal.getStatus()){
                //起售中的套餐不能删除
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        });

        ids.forEach(setmealId -> {
            //删除套餐表中的数据
            setmealMapper.deleteById(setmealId);
            //删除套餐菜品关系表中的数据
            setmealDishMapper.delete(setmealId);
        });
    }
}


